rustcrust Posted February 1, 2019 Share Posted February 1, 2019 Okay guys I have a 1985 F250 single cab long bed dual tank 460 carbureted with electric fuel pumps in the tank the wiring is a complete disaster from the relays all the way to the pumps which don't work ( has crudely mounted frame pump) ! I want to rewire the entire fuel pump harness from the relays back to the rear tank ..... I have been pouring over the wiring diagrams and I want to replace the wiring with color correct wires what gauge wire would you guys recommend mind you it will be running a fuel pump that is 10 feet from the relay . And in case you're wondering I need a brown /white stripe....solid red both power wires....sending unit wires yellow /blue stripe stripe..&yellow/white stripe Link to comment Share on other sites More sharing options...
Gary Lewis Posted February 1, 2019 Share Posted February 1, 2019 First, on our Resources page there's a link to 4RCUSTOMS, who say they have all the wire colors. As for the wire sizes, I'm going to guess that Ford used 14 gauge wire for the fuel pumps and 16 gauge or 18 gauge for the sending units. But that's just a guess. However, in a couple of days I could try to measure an extra harness I have - if you still need me to do so. Link to comment Share on other sites More sharing options...
Rembrant Posted February 1, 2019 Share Posted February 1, 2019 I will be starting the disassembly of an 85 F150 with electric feul pumps tomorrow, so I'll try to remember to check the wire gauges for you. Link to comment Share on other sites More sharing options...
rustcrust Posted February 1, 2019 Author Share Posted February 1, 2019 I will be starting the disassembly of an 85 F150 with electric feul pumps tomorrow, so I'll try to remember to check the wire gauges for you. The listings I am seeing on eBay for color coded wiring is 20 gauge is that to thin ? And where or what type of biz would you recommend I look locally for that might have color coded wires . Link to comment Share on other sites More sharing options...
Gary Lewis Posted February 1, 2019 Share Posted February 1, 2019 The listings I am seeing on eBay for color coded wiring is 20 gauge is that to thin ? And where or what type of biz would you recommend I look locally for that might have color coded wires . I think 20 ga is too small. Ford used smaller wire than I'm comfortable with, but I think 20 is much smaller than needed. If 4RCustoms doesn't have it then I'd start searching via Google. When I needed a red wire w/a specific stripe for Big Blue I found it via a Google search. Turned out it was available via Amazon from K4 Auto & Marine. But perhaps someone else will know another place? Link to comment Share on other sites More sharing options...
vjsimone Posted February 1, 2019 Share Posted February 1, 2019 The listings I am seeing on eBay for color coded wiring is 20 gauge is that to thin ? And where or what type of biz would you recommend I look locally for that might have color coded wires . You can get your Pink/Black here; https://www.sherco-auto.com/striped-tracer-wire.html And your Yellow/White here; https://4rcustomswire.com/products/16-gauge-gxl-wire-individual-yellow-striped-color-and-size-options Link to comment Share on other sites More sharing options...
Gary Lewis Posted February 1, 2019 Share Posted February 1, 2019 You can get your Pink/Black here; https://www.sherco-auto.com/striped-tracer-wire.html And your Yellow/White here; https://4rcustomswire.com/products/16-gauge-gxl-wire-individual-yellow-striped-color-and-size-options Vinny - Do you have good sources for the various colors? We need to put together a list for them as many of us would like to use the correct wire colors. So, if you have good sources then could you put together a list of what you know? And I can put it in Resources or somesuch. Link to comment Share on other sites More sharing options...
Steve83 Posted February 1, 2019 Share Posted February 1, 2019 Vinny - Do you have good sources for the various colors? We need to put together a list for them as many of us would like to use the correct wire colors. So, if you have good sources then could you put together a list of what you know? And I can put it in Resources or somesuch. Parts stores usually have solid-color wire: https://supermotors.net/getfile/243187/thumbnail/primary-wire.jpg I buy striped US-made wire on eBay & Amazon - search for "striped automotive wire". Junkyards are also good sources for quality wire with the correct colors... https://supermotors.net/getfile/913276/thumbnail/harness93modrke.jpg For the fuel pump power circuits, I wouldn't use smaller than 14ga. https://supermotors.net/getfile/870469/thumbnail/fuelpumpswap.jpg Link to comment Share on other sites More sharing options...
rustcrust Posted February 4, 2019 Author Share Posted February 4, 2019 Parts stores usually have solid-color wire: https://supermotors.net/getfile/243187/thumbnail/primary-wire.jpg I buy striped US-made wire on eBay & Amazon - search for "striped automotive wire". Junkyards are also good sources for quality wire with the correct colors... https://supermotors.net/getfile/913276/thumbnail/harness93modrke.jpg For the fuel pump power circuits, I wouldn't use smaller than 14ga. https://supermotors.net/getfile/870469/thumbnail/fuelpumpswap.jpg Thank you guys I will look up the places you guys suggested I started going over the birds nest of wiring today it's a real mess I think the fuel pump relay is bad the previous owners have a aftermarket fuel pump hooked to the wire coming from tank selector switch and there was a hose clamp missing on a fuel line glad I hadn't tried driving it yet !! Link to comment Share on other sites More sharing options...
Steve83 Posted February 5, 2019 Share Posted February 5, 2019 ...I think the fuel pump relay is bad...In any case, it should be replaced with the later Bosch/ISO/Tyco style of relay as this & the NEXT few captions explain: https://supermotors.net/getfile/507187/thumbnail/relays1.jpg Link to comment Share on other sites More sharing options...
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